The promo itself was gold, but the way it ended was dumb. If anything they should have had Taz react the opposite way, tease the heyman choke out and instead turn and choke out Vince and defect to the alliance.
Taz had been a member of the Alliance since July, and had pretty much been treated like the whipping boy/black sheep of it by Steve Austin from Day One. I imagine that had a lot to do with the ending, though I agree it's a little anticlimactic beyond that.